A new NASA analysis concludes that it is "reasonable to hypothesize" that living things could have formed the odd organic ...
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Life on Mars? New evidence strengthens the case
Unusual chemical compounds found on rocks on Mars could be a sign that life once existed on the red planet, though researchers have cautioned the evidence is far from conclusive.
NASA's Curiosity rover, which launched in 2011 from Florida, found signs of organic material that on Earth is most often produced by life.
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